h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

You can't do better than 'The Dinkum Dictionary' for bonza ways of saying, 'I imbibed slightly too much last night' :

a write-off
away with the birds/fairies/pixies
blasted
bleary-eyed
blind
blithered
blotto
bombed
boozed
canned
cock-eyed
corked
cut
dead to the world
drunk as a lord/owl/skunk
flaked out
full as a boot
full as a bull
full as a bull's bum
full as a fairy's phone book
full as a fart
full as a footy final
full as a goog
full as a pommy complaint-box
full as a seaside shithouse on bank holiday
full as a state-school hat-rack
full as a tick
full as the family jerry/po/pot
gone
groggy
had a few
had a skinful
half a sheet to the wind
half shot
half-seas over
high as a kite
history
hung-over
in the grip of the grape
inked
ironed out
lit up
loaded
merry
mollo
molly the monk
off one's face
off the planet
out of it
out of one's tree
out to it
out to the world
para
pickled
pie-eyed
pinko
pissed
pissed as a cricket
pissed as a fart
pissed as a newt
pissed as a parrot
pissed out of one's brain
pissed to the eyeballs
pissy
pissy-eyed
plastered
primed
ripe
ripped
rolling
rotten
rotten as a chop
sauced
screwed
shicker
shicky
shot
shot to the eyeballs
slewed
sloshed
smashed
soused
sozzled
spaced out
spastic
spiffed
spiflicated
squiffed
stewed
stewed to the gills
stinko
stoked
stoned
stonkered
stung
tanked
three parts gone
three sheets to the wind
tiddly
tight
tipsy
unable to scratch oneself
under the affluence of inkerhol
under the influence
under the table
under the weather
wasted
well oiled
whacked
wiped out
woozy
wrecked
zonked

and to end, 'Why do Australians drink XXXX?' - 'cos they can't spell beer'.
Nothing personal - some of my best friends are Australian.